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Finding the Third Proportional to 68.50 and 127.75

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Solution

The third proportional to 68.50 and 127.75 is: 238.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.50 : 127.75 = 127.75 : x
  2. Step 2: Convert to fraction form
    68.50/127.75 = 127.75/x
  3. Step 3: Cross multiply
    68.50x = 127.75 × 127.75
  4. Step 4: Simplify right side
    68.50x = 16,320.06
  5. Step 5: Solve for x
    x = 16,320.06/68.50
  6. Step 6: Final answer
    x = 238.25

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Why These Related Problems?

These problems maintain the same ratio (1.86) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.